109240309 has 2 divisors, whose sum is σ = 109240310. Its totient is φ = 109240308.

The previous prime is 109240301. The next prime is 109240337. The reversal of 109240309 is 903042901.

It is a happy number.

It is an a-pointer prime, because the next prime (109240337) can be obtained adding 109240309 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77000625 + 32239684 = 8775^2 + 5678^2 .

It is an emirp because it is prime and its reverse (903042901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 109240309 - 2³ = 109240301 is a prime.

It is a super-2 number, since 2×109240309² = 23866890220830962, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109240301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54620154 + 54620155.

It is an arithmetic number, because the mean of its divisors is an integer number (54620155).

Almost surely, 2^109240309 is an apocalyptic number.

It is an amenable number.

109240309 is a deficient number, since it is larger than the sum of its proper divisors (1).

109240309 is an equidigital number, since it uses as much as digits as its factorization.

109240309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 109240309 is about 10451.8088865038. The cubic root of 109240309 is about 478.0364067787.

The spelling of 109240309 in words is "one hundred nine million, two hundred forty thousand, three hundred nine".